Wireless telecommunication system including a base station, relay node and method for global fair scheduling

Abstract

The invention relates to a wireless telecommunication system including at least one Base Station (BS) for communicating with at least one multihop Relay Node (RN) using a wireless link of a first type and with at least one local user equipment unit (UE) located within a range of the base station (BS) using at least one wireless link of a second type, wherein the wireless link of the first type is used to transmit a combined data flow encapsulating multiple individual data flows relating to different services and / or remote user equipment (UE) units. In order to enable a global fair scheduling, the base station (BS) is further configured to receive at least one local fairness parameter from the multihop relay node (RN), said local fairness parameter representing a fairness of the distribution of radio resources of the relay node (RN) over the individual data flows in the combined data flow and to execute a global fair scheduling procedure for determining a fair distribution of available radio resources of the base station (BS) over said at least one wireless link of the first type and said at least one wireless link of the second type, wherein the local fairness parameter is used as a parameter in said global fair scheduling procedure.

Description

I. FIELD OF THE INVENTION[0001]The invention relates to cellular or hierarchical wireless telecommunication systems, to a base station, a relay node for use in such systems and to a method for global fair scheduling.II. TECHNICAL BACKGROUND OF THE INVENTION[0002]In future cellular systems like Long-Term-Evolution (LTE) Networks as described e.g. in the 3GPP technical specification TS 36.300v800, evolved UMTS Terrestrial Radio Access Networks (e-UTRAN) have been proposed. For such systems, the possibility of using multihop Relay Nodes (RN) for providing User Equipment (UE) devices such as cellular phones, handheld computers or the like with wireless access to a core network has been discussed but not yet realized. These multihop relay nodes would be connected to a Base Station (BS) of the Network via a wireless link. The multihop relay nodes would provide range extension (coverage) and capacity enhancement (through SNR improvement) for the network and for the user equipment devices.[...

AI Technical Summary

Benefits of technology

[0008]One of the Objects of the invention is to provide a wireless telecommunication system, in particular of cellular type, wherein a global fair scheduling and / or a fair distribution of the available resources is possible.

[0010]According to a central aspect of the invention, the base station is further configured to receive at least one local fairness parameter from the multihop relay node and to execute a global fair scheduling procedure for determining a fair distribution of available radio resources of the base station. If local fairness parameter is used as a parameter in said global fair scheduling procedure, the fairness of local distribution of resources can be taken into account when assigning resources to the multihop relay node, such that a globally fair distribution of resources can be achieved.

Problems solved by technology

The price of the decentralized scheduling would be that the local distribution of the resources of the multihop relay node would be not visible for higher level units, in particular for the base station scheduler.

As a consequence, the scheduling would be unfair if the base station scheduler would apply a standard fair scheduling scheme treating the multihop relay node in the same way as a local user equipment unit directly accessing the base station.

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